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Online since: October 2015
Authors: Diana Cayuela Marín, Waldir Mantovani, Cátia Relvas, Raul Fangueiro, Holmer Savastano, Júlia Baruque-Ramos, Bárbara Maria Gama Guimarães, Welton Fernando Zonatti, Fernando Cunha
Results and discussion Tensile properties The results obtained in tests carried out on universal tester machine are presented in Table 1.
There are a significant number of studies about hemp employment as reinforcement in thermoset and thermoplastic composites, based in its mechanical and thermal properties [22, 23].
Properties and potential applications of natural cellulose fibers from cornhusks.
The effect of alkalization and fibre alignment on the mechanical and thermal properties of kenaf and hemp bast fibre composites: Part 1 – polyester resin matrix.
Injection-Molded Short Hemp Fiber/Glass Fiber-Reinforced Polypropylene Hybrid Composites—Mechanical, Water Absorption and Thermal Properties.
Online since: November 2016
Authors: Gunther Reinhart, Johannes Fink, Christoph Richter, Georg Götz
Therefore, no mechanical clamping system is needed.
However, due to the optical properties, which are depending on the material and the wavelength of the laser source, these results could not be generalized.
To affect the laser beam diameter and the divergence a beam expander was installed within the optical path.
Aluminum films, as material pairing D, are unsuitable for laser beam processing in the tested way because of their low transmission factors.
The thermal characteristics of aluminium also affect the sealing and cutting process of the two films.
Online since: July 2016
Authors: Alexander Scheuermann, Jesinthan Ketheeswaran, Somayeh Behraftar
How fractures initiate, propagate and terminate under the influence of factors such as the surrounding stress regimes, inherent material properties and discontinuities present within the rock mass are all questions currently being researched and investigated.
Final Image of 70° inclination with displacement trajectories It was noted throughout the image analysis of the whole sample dataset that the surface voids and markings significantly affected the image analysis particle detection.
Acknowledgements This contribution is the result of the research supported by the Geotechnical Engineering Centre and the School of Mechanical & Mining Engineering, with special mention to Mr Eric Mullen for supplying and procuring the sandstone samples.
Online since: October 2012
Authors: Qing Jie Wen, Hui Lu
Characteristics of Bridge Design in Ming Area Underground mining cause ground displacement and deformation, whose factors mainly include subsidence, slope, curvity, horizontal displacement and deformation.
If groundwater level is very high, there will be accumulated water in the migrated basin after surface subsidence, which affects the foundation of the bridge.
Physical and Mechanical Properties Evolution and Engineering Response of Disturbed Soil in Ming Subsidence Area With Large Vertical Deformation.
Online since: December 2012
Authors: Bao Yin, Bu Ren Jirigala, Alateng Tuya
The formation of vulnerable eco-environment is partially related with the poverty, which is the key factor causing the vulnerable eco-environment.
Harmfulness index of natural disasters include the affected population, the number of casualties, the damage area, economic losses, and the data are from 1978 to 2009 collected by the Civil Affairs Department based on the county-level administrative units.
Economic indicators that reflect the regional poverty include per capita GDP, per capita fiscal income, per capita budget deficit, per capita net income of farmers and herdsmen, per capita food production, the number of per capita livestock; social welfare indicators that reflect the regional poverty include per capita retail sales of social consumer goods, per capita agricultural and pastoral mechanical power, per capita electricity consumption, per capita traffic, per capita amount of post and telecommunication services, the number of professional health personnel/ 10000 persons, the number of middle school students / 10000 persons, the number of elementary school students/ 10000 persons, etc.
Therefore, spline method is applied to do the spatial interpolation and to generate the spatial distribution map of meteorological factor of Inner Mongolia.
Spatial superposition analysis: superposition analysis method is to superpose two or more layers of map elements to produce a new layer of elements, and it follows that the new elements are generated by splitting or merging through the original elements, which integrate the properties of the original two-layer or multi-layer elements.
Online since: October 2015
Authors: N. Varalaxmi, Hardev Singh Virk, Sivakumar Kota V
The acoustic parameters usually determined are elastic constants, attenuation coefficients or loss factors.
The mobility of these defects, which is intrinsically related to the mechanical properties of material, can be investigated by this technique.
Thus studies on the elastic and anelastic behaviour of ferroelectric, ferromagnetic, ferrimagnetic, or ferroelastic materials throw considerable light on the phase transitions present in those materials since these properties are lattice related properties. 5.
Mason, Physical Acoustics and the Properties of Solids, Van Nostrand, Princeton, New Jersey (1985)
[40] S.R.Murthy, Elastic and Magnetic Properties of Nanosized NiZn Ferrites, Proc. of ICF 8, Kyoto, Japan (2000) 310 [41] T.
Online since: February 2014
Authors: Hong Hao Lu, Qiao Song Li, Fa Cheng Zhuo, Yun Bai
Introduction “Mixed Ground” refers to the ground which is composed of more than two layers (within or/and on the extension of excavation) which greatly differ from each other in both mechanical and hydrogeology properties.
As the purpose is to predict the settlement which is mainly caused by soil lose in shield tail, a 2D model was adopted and the deformation of shield tail was simulated through setting soil lose ration without considering the influence of other factors like support pressure, etc.
It means that this tunneling mode is reasonable for mixed ground which is soft-upward and hard-downward. 20 days after tunneling, settlement tended to be stable, and the settlement of right line was barely affected by tunneling of left line.
Online since: September 2013
Authors: Safet Isić, Ninoslav Zuber, Rusmir Bajrić
The spectral analysis may be unable to detect gear failures at an early stage of fault development, above all in the case of local faults, which primarily affect sidebands; in fact, it may be very difficult to evaluate the spacing and evolution of sideband families in the spectrum, taking into account that several gear pairs and other mechanical components usually contribute to the overall vibration.
Above proposed parameters perform better fault identicifaton, compared with the FM0, FM4, energy ratio (ER), sideband index (SI) and sideband level factor (SLF) in detecting and diagnosing planetary gearbox faults [34].
The use of cyclo-stationary properties of signals to identify and characterize sources of modulation has been approved in mining industrial gearbox [39].
Yang, Interpretation of mechanical signals using an improved Hilbert–Huang transform, Mech.
[39] Zimroz, R., Bartelmus, W., Gearbox condition estimation using cyclo-stationary properties of vibration signal, Key Engineering Materials 413-414 (2009) 471–478
Online since: December 2013
Authors: K.V.R. Murthy
Despaired with unpredictable properties of LiF, Daniels group turned their attention to the next material, Al2O3 [14].
The thermoluminescence properties of the Sr3Al2O6:Eu3+, RE3+ materials should accordingly be affected in a different manner by co-doping.
Botter-Jensen, Comparison of main Thermoluminescent Properties of some TL Dosemeters, Rad.
Murthy, Photoluminescence and thermoluminescence properties of Sr3Al2O6:Tb3+, Mater.
Thesis (unpublished): Photoluminescence and Thermoluminescence properties of Sr3Al2O6 doped with Rare Earths, M.S.
Online since: June 2015
Authors: Jin Sheng Li
To improve the cell performance of DSSCs based on 1D nanostructured photoanode, efforts should be made to increase the internal surface area and improve the light scattering properties while maintaining the excellent electron transport properties.
The structural properties were characterized by X ray diffraction meter (40 kV, 100 mA) and field emission scanning electron microscope (FESEM, Hitachi S4700).
The different IPCE performance of the DSSCs should be ascribed to the other two factors.
To further investigate the electron transport properties, electrochemical impedance spectroscopy (EIS) of the as-assembled DSSCs was measured in dark at open circuit.
Hong, Surfactant free most probable TiO2 nanostructures via hydrothermal and its dye sensitized solar cell properties, Sci.
Showing 25681 to 25690 of 26166 items